<template>
  <el-breadcrumb
    class="app-breadcrumb"
    separator="/"
  >
    <transition-group name="breadcrumb">
      <el-breadcrumb-item
        v-for="(item, index) in levelList"
        :key="item.meta.title"
      >
        <span
          v-if="item.redirect==='noRedirect'||index==levelList.length-1"
          class="no-redirect"
        >{{ item.meta.title }}</span>
        <a
          v-else
          @click.prevent="handleLink(item)"
        >
          {{ item.meta.title }}
        </a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script>
import pathToRegexp from 'path-to-regexp'

export default {
  data () {
    return {
      'levelList': [],
      'activeIndex': '1',
      'fullPath': '',
      'dashboardPath': '',
    }
  },
  'watch': {
    $route () {
      this.getBreadcrumb()
    },
  },
  created () {
    this.getBreadcrumb()
    // this.getMenu()
  },
  'methods': {
    getBreadcrumb () {
      // only show routes with meta.title
      let matched = this.$route.matched.filter((item) => {
        return item.meta && item.meta.title
      })
      const [first] = matched

      if (!this.isDashboard(first)) {
        matched = [
          {
            'path': '/dashboard',
            'meta': {
              'title': 'Centre系统',
            },
          },
        ].concat(matched)
      }

      this.levelList = matched.filter((item) => {
        return item.meta && item.meta.title && item.meta.breadcrumb !== false
      })
    },
    isDashboard (route) {
      const name = route && route.name
      if (!name) {
        return false
      }
      return name.trim().toLocaleLowerCase() === 'Dashboard'.toLocaleLowerCase()
    },
    pathCompile (path) {
      // To solve this problem https://github.com/PanJiaChen/vue-element-admin/issues/561
      const { params } = this.$route
      const toPath = pathToRegexp.compile(path)
      return toPath(params)
    },
    handleLink (item) {
      const { redirect, path } = item
      if (redirect) {
        this.$router.push(redirect)
        return
      }
      this.$router.push(this.pathCompile(path))
    },
  },
}
</script>

<style lang="scss" scoped>
.app-breadcrumb.el-breadcrumb {
  display: inline-block;
  font-size: 14px;
  line-height: 50px;
  margin-left: 8px;

  .no-redirect {
    color: #97a8be;
    cursor: text;
  }
}
.app-menu{
  display: inline-block;
  margin-left: 8px;
}

</style>
